[13a-N404-1~7] CS.4 3.6 超高速・高強度レーザー、3.7 レーザープロセシング、4.3 Lasers and laser materials processingのコードシェアセッション

▲ [13a-N404-5] Time-dependent unitary transformation method to numerically solve the strong-field-ionization dynamics in the Kramers-Henneberger frame

〇Je Hoi Mun^1,2、Hirofumi Sakai³、Dong Eon Kim^1,2 (1.POSTECH、2.Max Plank Korea、3.Tokyo Univ.)

キーワード：Strong-field ionzation, Time-dependent Schrodinger equation

We calculated the exact time evolution operator of an atomic wave function using a basis set composed of discrete states, including both the bound and the continuum states. We exploit the Kramers–Henneberger frame in which the strong-field-dressed discrete eigenstates are given by the field-free discrete eigenstates which are spatially displaced from the origin. We apply our novel approach to a one-dimensional atom exposed to intense ultrashort laser pulses and compare the results to those obtained from using the Crank–Nicolson method. Although this work is applied to a one-dimensional atom, our method can be applied for studying dynamics of three-dimensional atoms and molecules as well as solid materials exposed to a strong laser field.